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T101-4W — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

T101-4W: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, hole_diameter: 0.285 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN, outside_diameter: 0.460 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN, special_features: PEEING KEY 1 HOLE 0.060 IN. DIA NOM IN, style_designator: KEY, surface_treatment: PASSIVATE OVERALL.

This part is cataloged in the U.S. Government catalog under NSN 5310-01-144-9581, indicating validated use in U.S. government and defense logistics supply chains.

Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
T101-4W
NSN: 5310-01-144-9581
FSC: 5310 — Nuts and Washers
CAGE: 59570 — TRICO MANUFACTURING INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
hole_diameter0.285 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
outside_diameter0.460 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN
special_featuresPEEING KEY 1 HOLE 0.060 IN. DIA NOM IN
style_designatorKEY
surface_treatmentPASSIVATE OVERALL
material_thickness0.027 INCHES NOMINAL IN
peening_key_length0.277 INCHES NOMINAL IN
external_key_quantity4
external_straight_key_width0.160 INCHES NOMINAL IN
external_straight_key_length0.171 INCHES NOMINAL IN
overall_distance_including_keys0.988 INCHES NOMINAL IN
NSN5310-01-144-9581
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: T101-4W · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
EXTERNAL STRAIGHT KEY LENGTH: 0.171 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DISTANCE INCLUDING KEYS: 0.988 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.460 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN
•
PEENING KEY LENGTH: 0.277 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.027 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
EXTERNAL STRAIGHT KEY LENGTH0.171 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
OVERALL DISTANCE INCLUDING KEYS0.988 INCHES NOMINAL IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.460 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN
PEENING KEY LENGTH0.277 INCHES NOMINAL IN
MATERIAL THICKNESS0.027 INCHES NOMINAL IN
EXTERNAL STRAIGHT KEY WIDTH0.160 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY4
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
3M915W4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is T101-4W?
T101-4W is a WASHER,KEY.
What parts can replace T101-4W?
There is 1 known substitute for T101-4W: 3M915W4. Substitute compatibility should be verified for your specific system.
What is the NSN for T101-4W?
T101-4W is cataloged in the U.S. Government catalog under NSN 5310-01-144-9581. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.